The temperature on May 4, 1911 was between 4.0 °C and 14.5 °C and averaged 9.9 °C. There was 9.5 mm of rain. There was 7.7 hours of sunshine (51%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
January 5 » Kappa Alpha Psi, the world's third oldest and largest black fraternity, is founded at Indiana University.
February 18 » The first official flight with airmail takes place from Allahabad, United Provinces, British India (now India), when Henri Pequet, a 23-year-old pilot, delivers 6,500 letters to Naini, about 10 kilometres (6.2mi) away.
March 25 » In New York City, the Triangle Shirtwaist Factory fire kills 146 garment workers.
May 9 » The works of Gabriele D'Annunzio are placed in the Index of Forbidden Books by the Vatican.
August 14 » United States Senate leaders agree to rotate the office of President pro tempore of the Senate among leading candidates to fill the vacancy left by William P. Frye's death.
November 5 » After declaring war on the Ottoman Empire on September 29, 1911, Italy annexes Tripoli and Cyrenaica.
When copying data from this family tree, please include a reference to the origin: Jean Wasserman, "Family tree Wasserman", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-wasserman/I4147.php : accessed January 31, 2026), "Willem Lambrichts".
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